I own a 93 318is with an automatic trans. I've owned the car since 94 and have had to replace the tranny 2 times. I'm now looking into performance upgrades but I want to loose the auto. What would be involved in coverting to manual? Also, if I'm planning on increasing performance should I look to do a complete swap (engine & tranny), or just the tranny and use some sort of forced induction on the m42? Any advice will be greatly appreciated.